The Whitewater River Run in Connecticut is a popular white water rafting destination that begins below the tailrace of the Lower Collinsville Dam and extends downstream to the Route 187 Bridge. The ideal streamflow range for this run is between 500-1000 cubic feet per second (cfs), with the best time to go in late spring when the snowmelt and rainfall cause the highest water levels.

The segment mileage of the Whitewater River Run is about 3.5 miles, with a class III-IV rating. The river features several rapids and obstacles, including the Frog Hollow, The Steps, The Maze, and Satan's Kingdom. These rapids offer a thrill to experienced rafters, but can be challenging for beginners.

Specific regulations to the area include wearing proper safety gear, including a helmet, and a life jacket. Additionally, a permit is required to access the river and park at designated areas. It is also important to follow Leave No Trace principles and respect the natural environment.

Overall, the Whitewater River Run offers an exciting and challenging white water rafting experience in Connecticut, with its ideal streamflow range, class rating, segment mileage, specific river rapids/obstacles, and regulations. It is important to plan and prepare accordingly to ensure a safe and enjoyable trip.